diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fd5db99..036d044 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -20,6 +20,10 @@ jobs:
         # pick lower and upper versions only
         python-version: ["3.9", "3.12"]
 
+    env:
+      # Use a non-interactive matplotlib backend
+      MPLBACKEND: Agg
+
     steps:
       - uses: actions/checkout@v4
 
@@ -41,9 +45,9 @@ jobs:
       - name: Run tests with required packages
         run: pytest -v --cov
 
-      - name: Install PyQt5 for macOS
-        if: matrix.os == 'macos-latest'
-        run: pip install PyQt5
+      # - name: Install PyQt5 for macOS
+      #   if: matrix.os == 'macos-latest'
+      #   run: pip install PyQt5
 
       - name: Run tests with optional packages
         run: |
diff --git a/tests/test_modflow.py b/tests/test_modflow.py
index 38b397a..637adc7 100644
--- a/tests/test_modflow.py
+++ b/tests/test_modflow.py
@@ -1957,7 +1957,7 @@ def test_flopy_package_period(tmp_path):
             ],
             np.float32,
         )
-        np.testing.assert_almost_equal(dl["q"], expected_q)
+        np.testing.assert_allclose(dl["q"], expected_q)
         assert "RLEN" not in dl.dtype.names
         assert "RLEN".ljust(16) not in dl.dtype.names